ephemeris
/ɪˈfemərɪs/noun
(pl. ephemerides /ˌefɪˈmerɪdiːz/)
1- Astronomy & Astrology a table or data file giving the calculated positions of a celestial object at regular intervals throughout a period【天文, 占星】星历表。
1.1
- a book or set of such tables or files（带星历表的）历书。
词源
early 16th cent.: from Latin, from Greek ephēmeros 'lasting only a day'.